Main Entry: cost·mary

Pronunciation: \ˈkȯst-ˌmer-ē, ˈkäst-\

Function: noun

Inflected Form(s): plural cost·mar·ies

Etymology: Middle English costmarie, from coste costmary (from Old English cost, from Latin costum, from Greek kostos, a fragrant root) + Marie the Virgin Mary

Date: 14th century

: an aromatic composite Eurasian herb (Chrysanthemum balsamita syn. Tanacetum balsamita) having leaves used as a potherb and in flavoring